ADD: added a lot of ic ids to cmdhf15.c Thanks to Asper for the list.

ADD: added a manufacturer list in "hf 14a reader",  only viable when UID is double or triple size.  Thanks to Asper for the list.
ADD: detect chinese magic backdoor commands in "hf 14a reader"
CHG: minor code clean up.

client/graph.c

@@ -36,6 +36,8 @@ void AppendGraph(int redraw, int clock, int bit)
 int ClearGraph(int redraw)
 {
   int gtl = GraphTraceLen;
+  memset(GraphBuffer, 0x00, GraphTraceLen);
+
   GraphTraceLen = 0;
 
   if (redraw)